(let [args {:x 1, :y 2}
      fms {:add (fm [:x :y]
                    (+ x y))}
      tf (treefm fms :add)]
  (tf args))

* Motivation
- treefn's are flexible, easy to manipulate, composable, and
  reusable, however, are cumbersome to create/call for common tasks
- there is a need to make it easier to create/call treefn's that
  are commonly used
- The "point" model attempts to solve this problem by providing a
  reference "point" that is easy to use/call

* Model
- Points are simply an encapsulation of an output key
  (:target), treefn map (:treefns), and default input map
  (:inputs)
- Any existing point can be modified to provide the exact same
  functionality of another point